Transformers and electrical motors

Transformers and electrical motors

For access to this article, please select a purchase option:

Buy chapter PDF
(plus tax if applicable)
Buy Knowledge Pack
10 chapters for £75.00
(plus taxes if applicable)

IET members benefit from discounts to all IET publications and free access to E&T Magazine. If you are an IET member, log in to your account and the discounts will automatically be applied.

Learn more about IET membership 

Recommend Title Publication to library

You must fill out fields marked with: *

Librarian details
Your details
Why are you recommending this title?
Select reason:
Industrial Power Systems with Distributed and Embedded Generation — Recommend this title to your library

Thank you

Your recommendation has been sent to your librarian.

Electric motors and transformers can be found in applications from computer disk drives, appliances, cars, power supplies, laptop and cell phone chargers, to industrial process lines, pumping systems, conveyers, escalators, and many more. For example, modern building services are heavily reliant upon electrical motors and drives, found in air conditioning, ventilation, and heating systems, or elevators. All electric motors have a stationary part (component), the stator, a moving part (component), the rotor, and interface with energy supply and eventually control and protection subsystems. Transformers are electric energy convertors, operating on Faraday's law of induction, designed to step up or step down the voltages as required by the loads. Motors and transformers are introducing a great deal of flexibility in power transmission, distribution, and use. The precision of control, introduced by electric motors, through the application of torque, speed, and position control has been critical and central to all aspects of industrial processes, automation, or transportation. This chapter focuses on the analysis and description of electric transformers and main types of electric motors used in commercial and industrial applications. The reader is advised that the chapter content and materials are critical for the understanding of several book topics. Motor and transformer construction, components, characteristics, and performances are included and discussed in details, together with short discussion of the common transformer and motor applications. A short discussion of energy conversion is also included in this chapter. This chapter also discusses on equivalent circuits, power, torque, and losses of transformers, induction and synchronous motors, as well as the most common type of DC motors. Several examples are also included in all chapter sections to facilitate the chapter topics understanding.

Chapter Contents:

  • Objectives and abstract
  • 3.1 Introduction
  • 3.1.1 Transformers in electrical systems
  • 3.1.2 Electromechanical energy conversion systems
  • 3.2 Transformer theory, construction, and design
  • 3.2.1 Polarity of transformer windings
  • 3.2.2 Practical (non-ideal) transformers
  • 3.2.3 Voltage regulation
  • 3.2.4 Multi-winding transformer
  • 3.2.5 Transformer ratings, categories, types, and tap changers
  • 3.2.6 Transformer connections
  • 3.2.7 Transformer efficiency
  • 3.3 AC electrical motors
  • 3.3.1 Electric motor fundamentals
  • 3.3.2 Synchronous motors
  • 3.3.3 Induction motors
  • 3.4 DC machines
  • 3.5 Chapter summary
  • Further readings
  • Questions and problems

Inspec keywords: transformers; synchronous motors; DC motors; equivalent circuits

Other keywords: power; electric energy convertors; torque; DC motors; synchronous motors; equivalent circuits; electrical motors; energy conversion; electric transformers; induction motors

Subjects: Transformers and reactors; Synchronous machines; d.c. machines

Preview this chapter:
Zoom in

Transformers and electrical motors, Page 1 of 2

| /docserver/preview/fulltext/books/po/pbpo096e/PBPO096E_ch3-1.gif /docserver/preview/fulltext/books/po/pbpo096e/PBPO096E_ch3-2.gif

Related content

This is a required field
Please enter a valid email address